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<pre><span class="sourceLineNo">001</span><a name="line.1"></a>
<span class="sourceLineNo">002</span>/*<a name="line.2"></a>
<span class="sourceLineNo">003</span> * Copyright (C) 2011 Archie L. Cobbs. All rights reserved.<a name="line.3"></a>
<span class="sourceLineNo">004</span> *<a name="line.4"></a>
<span class="sourceLineNo">005</span> * $Id: ContextApplication.CloseEvent.html 689 2013-06-28 19:22:16Z archie.cobbs $<a name="line.5"></a>
<span class="sourceLineNo">006</span> */<a name="line.6"></a>
<span class="sourceLineNo">007</span><a name="line.7"></a>
<span class="sourceLineNo">008</span>package org.dellroad.stuff.vaadin;<a name="line.8"></a>
<span class="sourceLineNo">009</span><a name="line.9"></a>
<span class="sourceLineNo">010</span>import com.vaadin.Application;<a name="line.10"></a>
<span class="sourceLineNo">011</span>import com.vaadin.terminal.Terminal;<a name="line.11"></a>
<span class="sourceLineNo">012</span>import com.vaadin.terminal.gwt.server.HttpServletRequestListener;<a name="line.12"></a>
<span class="sourceLineNo">013</span>import com.vaadin.ui.Window;<a name="line.13"></a>
<span class="sourceLineNo">014</span><a name="line.14"></a>
<span class="sourceLineNo">015</span>import java.io.IOException;<a name="line.15"></a>
<span class="sourceLineNo">016</span>import java.io.ObjectInputStream;<a name="line.16"></a>
<span class="sourceLineNo">017</span>import java.io.ObjectOutputStream;<a name="line.17"></a>
<span class="sourceLineNo">018</span>import java.net.SocketException;<a name="line.18"></a>
<span class="sourceLineNo">019</span>import java.util.EventObject;<a name="line.19"></a>
<span class="sourceLineNo">020</span>import java.util.HashSet;<a name="line.20"></a>
<span class="sourceLineNo">021</span>import java.util.List;<a name="line.21"></a>
<span class="sourceLineNo">022</span>import java.util.concurrent.Executor;<a name="line.22"></a>
<span class="sourceLineNo">023</span>import java.util.concurrent.ExecutorService;<a name="line.23"></a>
<span class="sourceLineNo">024</span>import java.util.concurrent.Executors;<a name="line.24"></a>
<span class="sourceLineNo">025</span>import java.util.concurrent.Future;<a name="line.25"></a>
<span class="sourceLineNo">026</span>import java.util.concurrent.TimeUnit;<a name="line.26"></a>
<span class="sourceLineNo">027</span><a name="line.27"></a>
<span class="sourceLineNo">028</span>import javax.servlet.http.HttpServletRequest;<a name="line.28"></a>
<span class="sourceLineNo">029</span>import javax.servlet.http.HttpServletResponse;<a name="line.29"></a>
<span class="sourceLineNo">030</span><a name="line.30"></a>
<span class="sourceLineNo">031</span>import org.slf4j.Logger;<a name="line.31"></a>
<span class="sourceLineNo">032</span>import org.slf4j.LoggerFactory;<a name="line.32"></a>
<span class="sourceLineNo">033</span><a name="line.33"></a>
<span class="sourceLineNo">034</span>/**<a name="line.34"></a>
<span class="sourceLineNo">035</span> * {@link Application} subclass that provides some basic infrastructure for Vaadin applications:<a name="line.35"></a>
<span class="sourceLineNo">036</span> * &lt;ul&gt;<a name="line.36"></a>
<span class="sourceLineNo">037</span> *  &lt;li&gt;Access to the currently running Vaadin application (via a {@link ContextApplication#get()})&lt;/li&gt;<a name="line.37"></a>
<span class="sourceLineNo">038</span> *  &lt;li&gt;A way to safely interact with a Vaadin application from a background thread (via {@link ContextApplication#invoke})&lt;/li&gt;<a name="line.38"></a>
<span class="sourceLineNo">039</span> *  &lt;li&gt;Support for Vaadin {@linkplain ContextApplication#addListener application close event notifications}&lt;/li&gt;<a name="line.39"></a>
<span class="sourceLineNo">040</span> *  &lt;li&gt;Displays any exceptions thrown in an overlay error window&lt;/li&gt;<a name="line.40"></a>
<span class="sourceLineNo">041</span> *  &lt;li&gt;A {@link Logger} to use&lt;/li&gt;<a name="line.41"></a>
<span class="sourceLineNo">042</span> * &lt;/ul&gt;<a name="line.42"></a>
<span class="sourceLineNo">043</span> *<a name="line.43"></a>
<span class="sourceLineNo">044</span> * @since 1.0.134<a name="line.44"></a>
<span class="sourceLineNo">045</span> */<a name="line.45"></a>
<span class="sourceLineNo">046</span>@SuppressWarnings("serial")<a name="line.46"></a>
<span class="sourceLineNo">047</span>public abstract class ContextApplication extends Application implements Executor, HttpServletRequestListener {<a name="line.47"></a>
<span class="sourceLineNo">048</span><a name="line.48"></a>
<span class="sourceLineNo">049</span>    /**<a name="line.49"></a>
<span class="sourceLineNo">050</span>     * Default notification linger time for error notifications (in milliseconds): Value is {@value}ms.<a name="line.50"></a>
<span class="sourceLineNo">051</span>     */<a name="line.51"></a>
<span class="sourceLineNo">052</span>    public static final int DEFAULT_NOTIFICATION_DELAY = 30000;<a name="line.52"></a>
<span class="sourceLineNo">053</span><a name="line.53"></a>
<span class="sourceLineNo">054</span>    private static final ThreadLocal&lt;ContextApplication&gt; CURRENT_APPLICATION = new ThreadLocal&lt;ContextApplication&gt;();<a name="line.54"></a>
<span class="sourceLineNo">055</span>    private static final ThreadLocal&lt;HttpServletRequest&gt; CURRENT_REQUEST = new ThreadLocal&lt;HttpServletRequest&gt;();<a name="line.55"></a>
<span class="sourceLineNo">056</span>    private static final ThreadLocal&lt;HttpServletResponse&gt; CURRENT_RESPONSE = new ThreadLocal&lt;HttpServletResponse&gt;();<a name="line.56"></a>
<span class="sourceLineNo">057</span><a name="line.57"></a>
<span class="sourceLineNo">058</span>    protected final Logger log = LoggerFactory.getLogger(this.getClass());<a name="line.58"></a>
<span class="sourceLineNo">059</span><a name="line.59"></a>
<span class="sourceLineNo">060</span>    private final HashSet&lt;CloseListener&gt; closeListeners = new HashSet&lt;CloseListener&gt;();<a name="line.60"></a>
<span class="sourceLineNo">061</span><a name="line.61"></a>
<span class="sourceLineNo">062</span>    private transient volatile ExecutorService executorService;<a name="line.62"></a>
<span class="sourceLineNo">063</span><a name="line.63"></a>
<span class="sourceLineNo">064</span>// Initialization<a name="line.64"></a>
<span class="sourceLineNo">065</span><a name="line.65"></a>
<span class="sourceLineNo">066</span>    /**<a name="line.66"></a>
<span class="sourceLineNo">067</span>     * Initialize the application.<a name="line.67"></a>
<span class="sourceLineNo">068</span>     *<a name="line.68"></a>
<span class="sourceLineNo">069</span>     * &lt;p&gt;<a name="line.69"></a>
<span class="sourceLineNo">070</span>     * The implementation in {@link ContextApplication} delegates to {@link #initApplication}.<a name="line.70"></a>
<span class="sourceLineNo">071</span>     * &lt;/p&gt;<a name="line.71"></a>
<span class="sourceLineNo">072</span>     */<a name="line.72"></a>
<span class="sourceLineNo">073</span>    @Override<a name="line.73"></a>
<span class="sourceLineNo">074</span>    public final synchronized void init() {             // synchronized to work around http://dev.vaadin.com/ticket/9946<a name="line.74"></a>
<span class="sourceLineNo">075</span><a name="line.75"></a>
<span class="sourceLineNo">076</span>        // Set current application<a name="line.76"></a>
<span class="sourceLineNo">077</span>        CURRENT_APPLICATION.set(this);<a name="line.77"></a>
<span class="sourceLineNo">078</span><a name="line.78"></a>
<span class="sourceLineNo">079</span>        // Create executor service<a name="line.79"></a>
<span class="sourceLineNo">080</span>        this.executorService = Executors.newSingleThreadExecutor();<a name="line.80"></a>
<span class="sourceLineNo">081</span><a name="line.81"></a>
<span class="sourceLineNo">082</span>        // Initialize application<a name="line.82"></a>
<span class="sourceLineNo">083</span>        boolean initialized = false;<a name="line.83"></a>
<span class="sourceLineNo">084</span>        try {<a name="line.84"></a>
<span class="sourceLineNo">085</span>            this.initApplication();<a name="line.85"></a>
<span class="sourceLineNo">086</span>            initialized = true;<a name="line.86"></a>
<span class="sourceLineNo">087</span>        } finally {<a name="line.87"></a>
<span class="sourceLineNo">088</span>            if (!initialized)<a name="line.88"></a>
<span class="sourceLineNo">089</span>                this.shutdownExecutorService();<a name="line.89"></a>
<span class="sourceLineNo">090</span>        }<a name="line.90"></a>
<span class="sourceLineNo">091</span>    }<a name="line.91"></a>
<span class="sourceLineNo">092</span><a name="line.92"></a>
<span class="sourceLineNo">093</span>    /**<a name="line.93"></a>
<span class="sourceLineNo">094</span>     * Initialize the application. Sub-classes of {@link ContextApplication} must implement this method.<a name="line.94"></a>
<span class="sourceLineNo">095</span>     */<a name="line.95"></a>
<span class="sourceLineNo">096</span>    protected abstract void initApplication();<a name="line.96"></a>
<span class="sourceLineNo">097</span><a name="line.97"></a>
<span class="sourceLineNo">098</span>// Error handling<a name="line.98"></a>
<span class="sourceLineNo">099</span><a name="line.99"></a>
<span class="sourceLineNo">100</span>    /**<a name="line.100"></a>
<span class="sourceLineNo">101</span>     * Handle an uncaugt exception thrown by a Vaadin HTTP request.<a name="line.101"></a>
<span class="sourceLineNo">102</span>     *<a name="line.102"></a>
<span class="sourceLineNo">103</span>     * &lt;p&gt;<a name="line.103"></a>
<span class="sourceLineNo">104</span>     * The implementation in {@link ContextApplication} logs the error and displays in on the<a name="line.104"></a>
<span class="sourceLineNo">105</span>     * user's screen via {@link #showError(String, Throwable)}.<a name="line.105"></a>
<span class="sourceLineNo">106</span>     */<a name="line.106"></a>
<span class="sourceLineNo">107</span>    @Override<a name="line.107"></a>
<span class="sourceLineNo">108</span>    public void terminalError(Terminal.ErrorEvent event) {<a name="line.108"></a>
<span class="sourceLineNo">109</span><a name="line.109"></a>
<span class="sourceLineNo">110</span>        // Delegate to superclass<a name="line.110"></a>
<span class="sourceLineNo">111</span>        super.terminalError(event);<a name="line.111"></a>
<span class="sourceLineNo">112</span><a name="line.112"></a>
<span class="sourceLineNo">113</span>        // Get exception; ignore client "hangups"<a name="line.113"></a>
<span class="sourceLineNo">114</span>        final Throwable t = event.getThrowable();<a name="line.114"></a>
<span class="sourceLineNo">115</span>        if (t instanceof SocketException)<a name="line.115"></a>
<span class="sourceLineNo">116</span>            return;<a name="line.116"></a>
<span class="sourceLineNo">117</span><a name="line.117"></a>
<span class="sourceLineNo">118</span>        // Notify user and log it<a name="line.118"></a>
<span class="sourceLineNo">119</span>        this.showError("Internal Error", "" + t);<a name="line.119"></a>
<span class="sourceLineNo">120</span>        this.log.error("error within Vaadin operation", t);<a name="line.120"></a>
<span class="sourceLineNo">121</span>    }<a name="line.121"></a>
<span class="sourceLineNo">122</span><a name="line.122"></a>
<span class="sourceLineNo">123</span>    /**<a name="line.123"></a>
<span class="sourceLineNo">124</span>     * Display an error message to the user.<a name="line.124"></a>
<span class="sourceLineNo">125</span>     */<a name="line.125"></a>
<span class="sourceLineNo">126</span>    public void showError(String title, String description) {<a name="line.126"></a>
<span class="sourceLineNo">127</span><a name="line.127"></a>
<span class="sourceLineNo">128</span>        // Get window<a name="line.128"></a>
<span class="sourceLineNo">129</span>        Window window = this.getMainWindow();<a name="line.129"></a>
<span class="sourceLineNo">130</span>        if (window == null)<a name="line.130"></a>
<span class="sourceLineNo">131</span>            return;<a name="line.131"></a>
<span class="sourceLineNo">132</span><a name="line.132"></a>
<span class="sourceLineNo">133</span>        // Show error<a name="line.133"></a>
<span class="sourceLineNo">134</span>        Window.Notification notification = new Window.Notification(title, description, Window.Notification.TYPE_ERROR_MESSAGE);<a name="line.134"></a>
<span class="sourceLineNo">135</span>        notification.setStyleName("warning");<a name="line.135"></a>
<span class="sourceLineNo">136</span>        notification.setDelayMsec(this.getNotificationDelay());<a name="line.136"></a>
<span class="sourceLineNo">137</span>        window.showNotification(notification);<a name="line.137"></a>
<span class="sourceLineNo">138</span>    }<a name="line.138"></a>
<span class="sourceLineNo">139</span><a name="line.139"></a>
<span class="sourceLineNo">140</span>    /**<a name="line.140"></a>
<span class="sourceLineNo">141</span>     * Display an error message to the user caused by an exception.<a name="line.141"></a>
<span class="sourceLineNo">142</span>     */<a name="line.142"></a>
<span class="sourceLineNo">143</span>    public void showError(String title, Throwable t) {<a name="line.143"></a>
<span class="sourceLineNo">144</span>        for (int i = 0; i &lt; 100 &amp;&amp; t.getCause() != null; i++)<a name="line.144"></a>
<span class="sourceLineNo">145</span>            t = t.getCause();<a name="line.145"></a>
<span class="sourceLineNo">146</span>        this.showError(title, this.getErrorMessage(t));<a name="line.146"></a>
<span class="sourceLineNo">147</span>    }<a name="line.147"></a>
<span class="sourceLineNo">148</span><a name="line.148"></a>
<span class="sourceLineNo">149</span>    /**<a name="line.149"></a>
<span class="sourceLineNo">150</span>     * Get the notification linger time for error notifications (in milliseconds).<a name="line.150"></a>
<span class="sourceLineNo">151</span>     *<a name="line.151"></a>
<span class="sourceLineNo">152</span>     * &lt;p&gt;<a name="line.152"></a>
<span class="sourceLineNo">153</span>     * The implementation in {@link ContextApplication} returns {@link #DEFAULT_NOTIFICATION_DELAY}.<a name="line.153"></a>
<span class="sourceLineNo">154</span>     */<a name="line.154"></a>
<span class="sourceLineNo">155</span>    protected int getNotificationDelay() {<a name="line.155"></a>
<span class="sourceLineNo">156</span>        return DEFAULT_NOTIFICATION_DELAY;<a name="line.156"></a>
<span class="sourceLineNo">157</span>    }<a name="line.157"></a>
<span class="sourceLineNo">158</span><a name="line.158"></a>
<span class="sourceLineNo">159</span>    /**<a name="line.159"></a>
<span class="sourceLineNo">160</span>     * Convert an exception into a displayable error message.<a name="line.160"></a>
<span class="sourceLineNo">161</span>     */<a name="line.161"></a>
<span class="sourceLineNo">162</span>    protected String getErrorMessage(Throwable t) {<a name="line.162"></a>
<span class="sourceLineNo">163</span>        return t.getClass().getSimpleName() + ": " + t.getMessage();<a name="line.163"></a>
<span class="sourceLineNo">164</span>    }<a name="line.164"></a>
<span class="sourceLineNo">165</span><a name="line.165"></a>
<span class="sourceLineNo">166</span>// ThreadLocal stuff<a name="line.166"></a>
<span class="sourceLineNo">167</span><a name="line.167"></a>
<span class="sourceLineNo">168</span>    /**<a name="line.168"></a>
<span class="sourceLineNo">169</span>     * Set this instance as the "current application" (if not set already) while invoking the given callback.<a name="line.169"></a>
<span class="sourceLineNo">170</span>     *<a name="line.170"></a>
<span class="sourceLineNo">171</span>     * &lt;p&gt;<a name="line.171"></a>
<span class="sourceLineNo">172</span>     * This method is useful for situations in which non-Vaadin threads need to call into Vaadin code<a name="line.172"></a>
<span class="sourceLineNo">173</span>     * that expects to successfully retrieve the current application via {@link #currentApplication}.<a name="line.173"></a>
<span class="sourceLineNo">174</span>     * &lt;/p&gt;<a name="line.174"></a>
<span class="sourceLineNo">175</span>     *<a name="line.175"></a>
<span class="sourceLineNo">176</span>     * &lt;p&gt;<a name="line.176"></a>
<span class="sourceLineNo">177</span>     * This method also synchronizes on this {@link ContextApplication} instance as required by Vaadin for thread safety.<a name="line.177"></a>
<span class="sourceLineNo">178</span>     * &lt;/p&gt;<a name="line.178"></a>
<span class="sourceLineNo">179</span>     *<a name="line.179"></a>
<span class="sourceLineNo">180</span>     * @param action action to perform<a name="line.180"></a>
<span class="sourceLineNo">181</span>     * @throws IllegalStateException if a different {@link ContextApplication} is already set as the current application<a name="line.181"></a>
<span class="sourceLineNo">182</span>     *  associated with the current thread<a name="line.182"></a>
<span class="sourceLineNo">183</span>     * @see #invokeLater invokeLater()<a name="line.183"></a>
<span class="sourceLineNo">184</span>     */<a name="line.184"></a>
<span class="sourceLineNo">185</span>    public void invoke(Runnable action) {<a name="line.185"></a>
<span class="sourceLineNo">186</span>        final ContextApplication previous = ContextApplication.CURRENT_APPLICATION.get();<a name="line.186"></a>
<span class="sourceLineNo">187</span>        if (previous != null &amp;&amp; previous != this)<a name="line.187"></a>
<span class="sourceLineNo">188</span>            throw new IllegalStateException("there is already a current application for this thread");<a name="line.188"></a>
<span class="sourceLineNo">189</span>        ContextApplication.CURRENT_APPLICATION.set(this);<a name="line.189"></a>
<span class="sourceLineNo">190</span>        try {<a name="line.190"></a>
<span class="sourceLineNo">191</span>            synchronized (this) {<a name="line.191"></a>
<span class="sourceLineNo">192</span>                action.run();<a name="line.192"></a>
<span class="sourceLineNo">193</span>            }<a name="line.193"></a>
<span class="sourceLineNo">194</span>        } finally {<a name="line.194"></a>
<span class="sourceLineNo">195</span>            ContextApplication.CURRENT_APPLICATION.set(previous);<a name="line.195"></a>
<span class="sourceLineNo">196</span>        }<a name="line.196"></a>
<span class="sourceLineNo">197</span>    }<a name="line.197"></a>
<span class="sourceLineNo">198</span><a name="line.198"></a>
<span class="sourceLineNo">199</span>    /**<a name="line.199"></a>
<span class="sourceLineNo">200</span>     * Set this instance as the "current application" and invoke the given callback from within another thread.<a name="line.200"></a>
<span class="sourceLineNo">201</span>     *<a name="line.201"></a>
<span class="sourceLineNo">202</span>     * &lt;p&gt;<a name="line.202"></a>
<span class="sourceLineNo">203</span>     * This method functions like {@link #invoke invoke()} except that {@code action} will be invoked from within<a name="line.203"></a>
<span class="sourceLineNo">204</span>     * a separate thread dedicated to this application instance. This is useful to reduce Vaadin application lock<a name="line.204"></a>
<span class="sourceLineNo">205</span>     * contention, by performing Vaadin-related actions in a separate, dedicated thread. Actions are executed<a name="line.205"></a>
<span class="sourceLineNo">206</span>     * in the order they are given to this method.<a name="line.206"></a>
<span class="sourceLineNo">207</span>     * &lt;/p&gt;<a name="line.207"></a>
<span class="sourceLineNo">208</span>     *<a name="line.208"></a>
<span class="sourceLineNo">209</span>     * &lt;p&gt;<a name="line.209"></a>
<span class="sourceLineNo">210</span>     * The returned {@link Future}'s {@link Future#get get()} method will return null upon successful completion.<a name="line.210"></a>
<span class="sourceLineNo">211</span>     * This method itself always returns immediately.<a name="line.211"></a>
<span class="sourceLineNo">212</span>     * &lt;/p&gt;<a name="line.212"></a>
<span class="sourceLineNo">213</span>     *<a name="line.213"></a>
<span class="sourceLineNo">214</span>     * @param action action to perform<a name="line.214"></a>
<span class="sourceLineNo">215</span>     * @return a {@link Future} representing the pending results of {@code action}<a name="line.215"></a>
<span class="sourceLineNo">216</span>     * @throws IllegalStateException if this instance is not initialized or has been closed<a name="line.216"></a>
<span class="sourceLineNo">217</span>     * @see #invoke invoke()<a name="line.217"></a>
<span class="sourceLineNo">218</span>     */<a name="line.218"></a>
<span class="sourceLineNo">219</span>    public Future&lt;?&gt; invokeLater(Runnable action) {<a name="line.219"></a>
<span class="sourceLineNo">220</span>        ExecutorService executor = this.executorService;<a name="line.220"></a>
<span class="sourceLineNo">221</span>        if (executor == null)<a name="line.221"></a>
<span class="sourceLineNo">222</span>            throw new IllegalStateException("application instance is either not initialized or already closed");<a name="line.222"></a>
<span class="sourceLineNo">223</span>        return executor.submit(new LaterRunnable(action));<a name="line.223"></a>
<span class="sourceLineNo">224</span>    }<a name="line.224"></a>
<span class="sourceLineNo">225</span><a name="line.225"></a>
<span class="sourceLineNo">226</span>    /**<a name="line.226"></a>
<span class="sourceLineNo">227</span>     * {@link Executor} interface method, equivalent to {@link #invoke invoke()}.<a name="line.227"></a>
<span class="sourceLineNo">228</span>     *<a name="line.228"></a>
<span class="sourceLineNo">229</span>     * @see #invoke invoke()<a name="line.229"></a>
<span class="sourceLineNo">230</span>     */<a name="line.230"></a>
<span class="sourceLineNo">231</span>    public void execute(Runnable action) {<a name="line.231"></a>
<span class="sourceLineNo">232</span>        this.invoke(action);<a name="line.232"></a>
<span class="sourceLineNo">233</span>    }<a name="line.233"></a>
<span class="sourceLineNo">234</span><a name="line.234"></a>
<span class="sourceLineNo">235</span>    /**<a name="line.235"></a>
<span class="sourceLineNo">236</span>     * Handle the start of a request.<a name="line.236"></a>
<span class="sourceLineNo">237</span>     *<a name="line.237"></a>
<span class="sourceLineNo">238</span>     * &lt;p&gt;<a name="line.238"></a>
<span class="sourceLineNo">239</span>     * The implementation in {@link ContextApplication} delegates to {@link #doOnRequestStart}.<a name="line.239"></a>
<span class="sourceLineNo">240</span>     * &lt;/p&gt;<a name="line.240"></a>
<span class="sourceLineNo">241</span>     */<a name="line.241"></a>
<span class="sourceLineNo">242</span>    @Override<a name="line.242"></a>
<span class="sourceLineNo">243</span>    public final void onRequestStart(HttpServletRequest request, HttpServletResponse response) {<a name="line.243"></a>
<span class="sourceLineNo">244</span>        ContextApplication.CURRENT_APPLICATION.set(this);<a name="line.244"></a>
<span class="sourceLineNo">245</span>        ContextApplication.CURRENT_REQUEST.set(request);<a name="line.245"></a>
<span class="sourceLineNo">246</span>        ContextApplication.CURRENT_RESPONSE.set(response);<a name="line.246"></a>
<span class="sourceLineNo">247</span>        this.doOnRequestStart(request, response);<a name="line.247"></a>
<span class="sourceLineNo">248</span>    }<a name="line.248"></a>
<span class="sourceLineNo">249</span><a name="line.249"></a>
<span class="sourceLineNo">250</span>    /**<a name="line.250"></a>
<span class="sourceLineNo">251</span>     * Handle the end of a request.<a name="line.251"></a>
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<span class="sourceLineNo">507</span>        public void run() {<a name="line.507"></a>
<span class="sourceLineNo">508</span>            try {<a name="line.508"></a>
<span class="sourceLineNo">509</span>                ContextApplication.this.invoke(this.action);<a name="line.509"></a>
<span class="sourceLineNo">510</span>            } catch (ThreadDeath t) {<a name="line.510"></a>
<span class="sourceLineNo">511</span>                throw t;<a name="line.511"></a>
<span class="sourceLineNo">512</span>            } catch (Throwable e) {<a name="line.512"></a>
<span class="sourceLineNo">513</span>                ContextApplication.this.log.error("exception thrown by invokeLater() action " + this.action, e);<a name="line.513"></a>
<span class="sourceLineNo">514</span>            }<a name="line.514"></a>
<span class="sourceLineNo">515</span>        }<a name="line.515"></a>
<span class="sourceLineNo">516</span><a name="line.516"></a>
<span class="sourceLineNo">517</span>        @Override<a name="line.517"></a>
<span class="sourceLineNo">518</span>        public String toString() {<a name="line.518"></a>
<span class="sourceLineNo">519</span>            return this.action.toString();<a name="line.519"></a>
<span class="sourceLineNo">520</span>        }<a name="line.520"></a>
<span class="sourceLineNo">521</span>    }<a name="line.521"></a>
<span class="sourceLineNo">522</span><a name="line.522"></a>
<span class="sourceLineNo">523</span>// Serialization<a name="line.523"></a>
<span class="sourceLineNo">524</span><a name="line.524"></a>
<span class="sourceLineNo">525</span>    private void readObject(ObjectInputStream in) throws IOException, ClassNotFoundException {<a name="line.525"></a>
<span class="sourceLineNo">526</span>        in.defaultReadObject();<a name="line.526"></a>
<span class="sourceLineNo">527</span>        if (in.readBoolean())<a name="line.527"></a>
<span class="sourceLineNo">528</span>            this.executorService = Executors.newSingleThreadExecutor();<a name="line.528"></a>
<span class="sourceLineNo">529</span>    }<a name="line.529"></a>
<span class="sourceLineNo">530</span><a name="line.530"></a>
<span class="sourceLineNo">531</span>    private void writeObject(ObjectOutputStream out) throws IOException {<a name="line.531"></a>
<span class="sourceLineNo">532</span>        out.defaultWriteObject();<a name="line.532"></a>
<span class="sourceLineNo">533</span>        out.writeBoolean(this.executorService != null);<a name="line.533"></a>
<span class="sourceLineNo">534</span>    }<a name="line.534"></a>
<span class="sourceLineNo">535</span>}<a name="line.535"></a>
<span class="sourceLineNo">536</span><a name="line.536"></a>




























































</pre>
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